Oka and Volga Rivers in Nizhny Novgorod Oblast, Russia

The Oka River meanders across this APM image of Russia’s Nizhny Novgorod Oblast. The oblast covers an area of 76,900 square kilometers (29,691.3 sq mi). Agricultural land occupies 41% of this area; forests, 48%, lakes and rivers, 2%; and other lands, 9%.

The Oka is the largest right tributary of the Volga River. Their confluence is located just past the right border of this image. In fact, upon opening the full image, the river visible at the top is actually the Volga, rather than a continuation of the Oka.

The body of water connected to the Volga is the Gorkovsky Reservoir (also known as the Gorky Reservoir), an artificial lake. The Nizhny Novgorod Hydroelectric Station is located where the river and lake meet.